I think I convinced them because after I asked for access to their private search API for http://swarmstream.org and sent them BTC to test it out, I noticed they added bitcoin donation banners to their site. Their search is awesome, and it is such a great addition to my site.

are several strings or "flags". All of these strings start with secret_

But the bitcoins are stored in bitcoin addresses derived from those, so sharing the addresses helps us see the bitcoins really exist and verify they we're really created from those "secrets" in the first place. Hope it helps.

Apologies, it looks like there is a miscommunication. You are not hacking into the bitcoin addresses themselves. At the moment only testnet BTC are stored in our hotwallet. For example, if you manage to compromise that hot wallet and locate the secret there (there's one hint for you), and explain to us how you did it, we will send you real BTC.

are several strings or "flags". All of these strings start with secret_

But the bitcoins are stored in bitcoin addresses derived from those, so sharing the addresses helps us see the bitcoins really exist and verify they we're really created from those "secrets" in the first place.